Improvement in priming metallic cartridges



E. MAYNARD.

Cartridge. No. 59,044. Patented Oct. 23,1866.

Wit e. s s a s.

% Inv enter.

' w mm Mtg UNITED STATES PATENT OFFICE.

EDVARD MAYNARD, OF TARRYTOWN, NEW YORK.

IMPROVEMENT IN PRIMING METALLIC CARTRIDGES.

Specification forming part of Letters Patent No. 59,044, dated October 23, 1866 antcdated October 3, 1866.

erence being had to the accompanying draw-' ings, forming a part of this specification, in which- Figure l is a central longitudinal section of the simple form of my improved primed cartridges; Figs. 2 and 3, similar sections respectively, of modifications thereof; Fig. 4,

a transverse section through the base of the cartridge illustrated by Fig. 3, in the line as 00 thereof; Fig. 5, a bottom view of a second form of retracting-arm cartridge as improved by my invention; and Fig. 6, a transverse section through the bottom thereof, showing the position of the priming-cavity therein with reference to the arm and supporting-lug.

Similar letters indicate like parts in all of the figures.

The nature of my invention consists in the combination of an outer cap or cover of thin metal with a priming recess formed exteriorly in the base of a cartridge, when said base is provided with a projecting rim or flange, or with pins or arms, so as to be firmly supported when placed in the gun, and is made of such strength as to afford proper resistance to the blow of the hammer in firing the charge.

Fig. 1 illustrates my invention as applied to the metallic cartridges for which I obtained Letters Patent on the 28th day of May, 1861. These cartridges are constructed of a thin metallic cap, a, secured by solder or otherwise upon a solid disk, 6, of a diameter so far greater than that of the cup as to project and form a supporting-flange around the bottom thereof, as seen in the drawings.

In the center of the thick double bottom of this cartridge I form a small primingcavity, c, of any suitable form, having a vent communicating therefrom with the interior of the cartridge. When'this cavity has been filled with fulminate Iprotect it by a cap, 0, of thin metal, made to fit closely over the entire disk forming the base of the cartridge. This cap 6 shields completely the fulminate from expossupported base, whatever the composition of the cup or casing may be, whether of papiermach, metal, or otherwise.

In Fig. 2 a modification of the base is illus trated, i1; which, although a sufficiently solid supporting-flange is retained, the central part only of the disk is covered by the shieldingcap (2.

In Fig. 3 its application to such forms of cartridges as are provided with a solid retracting-arm, as set forth in my Letters Patent of September 8, 1863, is shown.

In applying my improvement to these cartridges, the solid base must be either slightly enlarged, (see m in Fig. 3,) to provide a supporting-flange thereto, or a projecting lug, g, must be formed, (as seen in Figs. 5 and 6,) in addition to the arm, for the same purpose.

I hen a lug is formed upon the base of the cartridge in relation to the retracting-arm it becomes necessary in such cartridges as are to be used in my improved fire-arms having a hinged breech-block, or others of a similar pattern, to place such lug g at the end of the chord of an are less than a semicircle; and in order to obtain proper resistance to the blow of the hammer upon the base when thus supported,

I place the priming recess in such cartridges in a line between the arm f and lug g, as illustrated in Figs. 5 and 6, rather than in the center thereof.

In fitting the shielding-cap 0 over and upon the base I) of such cartridges, I' cause its rim to embrace the retracting'arm and the lug by cutting away said rim at these points.

Having thus fully described my improvesupport from the gun and is primed exteriorly, 5 ment in primed cart-ridges, What I claim there-l substantially in the manner and for the purin as new and desire to secure by Letters Patpose herein set forth.

ent, is EDWARD MAYNARD.

A closely-fitting metallic shield or cover, in Witnesses: combination with the base of a cartridge, when H. H. YOUNG,

said base is so constructed as to receive solid DAVID A. BURR. 

